How do I stop the Calls????

No one responds when I answered my phone.

this number is probably a telemarketer auto dialer, it records numbers that answer their phones so they have a list of numbers that will answer their phones so they don't waste time calling numbers that dont answer. I like to let my fax answer and blast them with fax tone, they usually don't call back.

This phone number showed up on my caller I.D. I have no idea who this is.

I get lots of calls from this number but when I call the number it says it is disconnected.  They always hang up on me.

"Unknown name" appears on caller ID; hangs up when answering machine picks up.

despite having all phones listed on the do not call registry, I continue to get calls from this number.  When I asked to be removed from their calling list, they hang up on me.